Answer:
20&£+)##&843&()-_££-()&_2+0&&-£_!)
An 800 N man climbs 5 m up a ladder. How much gravitational potential energy does he gain?
Answer:
4000J
Explanation:
Given parameters:
Weight of the man = 800N
Height of ladder = 5m
Unknown:
Gravitational potential energy gained = ?
Solution:
The gravitational potential energy is due to the position of a body.
Gravitational potential energy = weight x height
Now insert the parameters;
Gravitational potential energy = 800 x 5 = 4000J
POSS An apple with a mass of 2 kg falls from a tree with an acceleration of 9 "What is the net force of the apple as it hits the ground?
Answer:
F = 19.62[N]
Explanation:
By means of Newton's second law which tells us that the sum of the forces on a body is equal to the product of mass by acceleration, we can determine the force.
[tex]F=m*a[/tex]
where:
F = force [N]
m = mass = 2 [kg]
a = gravity acceleration = 9.81 [m/s²]
Now replacing:
[tex]F=2*9.81\\F=19.62[N][/tex]
Radars can help meteorologists detect clouds and sailors detect submarines. Radars send out radio waves and record their echoes after the radio waves reflect off an object. Two radars send out radio waves with the same frequency. The first radar sends radio waves through the air. The second radar sends radio waves through the ocean. What is true about these radio waves? SC.7.P.10.3 A. They are visible. B. They are audible. C. They have different speeds D. They have the same wavelength
Answer:
They have different speeds
Explanation:
Answer:
They have different speeds
Explanation:
A bowling ball rolls off a cliff at 5 m/s. The vertical velocity after 1 second is.....
A. 9.8 m/s
B. 19.6 m/s
C. 29.4 m/s
Answer:
A. 9.8 m/s
Explanation:
The vertical velocity of an object increases by 9.8 m/s each second. After 1 second, the bowling ball would have a vertical velocity of 9.8 m/s.
What happens to the gravitational force between two objects when the distance between them is reduced by 50%?
A the gravitational force decreases by 50%
B the gravitational force increases by 50%
Cthe gravitational force decreases by 25%
the gravitational force increases by 400%
Question 8
Answer:
B
Explanation:
A box of mass m is held at rest on a frictionless surface with force F up the ramp. The ramp has an angle
What is the magnitude of the normal force?
Choose 1 answer:
The magnitude of the normal force is to be considered as the mg cos θ when the box of mass m is at rest.
What is magnitude?In terms of physics, it refer to the maximum size where it should be extended also it defined the object direction. It is factor for vector and the scalar quantities.
When the box of mass m should be at rest so here the ramp should be an angle so here the weight should be perpendicular to the string.
hence, The magnitude of the normal force is to be considered as the mg cos θ when the box of mass m is at rest.
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WILL MARK BRAINLIEST
Which graph shows the relationship between temperature, X, and kinetic energy, Y?
An illustration of a triangle with the base labeled X with the height labeled Y.
A graph with the x axis labeled X and the y axis labeled Y. There is a diagonal line from the origin.
A graph with the x axis labeled X and the y axis labeled Y. There is a horizontal line.
A graph with the x axis labeled X and the y axis labeled Y. There is a vertical line.
Answer:
no 2 A graph with the x axis labelled X and Y axis labelled Y
Calculate the rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.
Answer: The rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.= 1.25 watt.
Explanation:
The rate of energy transfer from one point to another is known as power.Its SI. unit is Watt.Formula to compute power:
Power = [tex]I^2 R[/tex], I = cureent, R = resistance.
Given R = 5 ohm , Current = 0.5 A.
Then, power = [tex](0.5)^2\times 5=0.25\times5=1.25\ watt[/tex]
Hence, the rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.= 1.25 watt.
A 1,200 kg car travels at 20 m/s. what is its momentum?
Answer:
The answer is 24 000kgm/s.
Explanation:
Given that the formula for momentum is p = m×v where m represent mass and v is speed :
let m = 1200, v = 20
p = m × v
p = 1200 × 20
p = 24 000 kgm/s
What is the kinetic energy of a ball that has a mass of 3kg and Is
moving at 5m/s?
Answer:
E kin = 1/2 • m • v^2
E kin: kinetic energy
m: mass
v: velocity
Explanation:
Which has more kinetic energy, a 4.0 kg bowling ball moving at 1.0 m/s or a 1.0 kg
bocce ball moving at 4.0 m/s? Explain your answer
Answer:
The kinetic energy of bocce ball is more.
Explanation:
Given that,
Mass of a bowling ball, m₁ = 4 kg
Speed of the bowling ball, v₁ = 1 m/s
Mass of bocce ball, m₂ = 1 kg
Speed of bocce ball, v₂ = 4 m/s
We need to say which has more kinetic energy.
The kinetic energy of an object is given by :
[tex]E=\dfrac{1}{2}mv^2[/tex]
Kinetic energy of the bowling ball,
[tex]E_1=\dfrac{1}{2}m_1v_1^2\\\\E_1=\dfrac{1}{2}\times 4\times (1)^2\\\\E_1=2\ J[/tex]
The kinetic energy of the bocce ball,
[tex]E_2=\dfrac{1}{2}m_2v_2^2\\\\E_2=\dfrac{1}{2}\times 1\times (4)^2\\\\E_2=8\ J[/tex]
So, the kinetic energy of bocce ball is more than that of bowling ball.
Which wave, A or B, has higher energy?
A
O A, because it has a higher amplitude
OB, because it has a higher amplitude
O A, because it has a lower amplitude
OB, because it has a lower amplitude
АЛЛА
B
Answer:
Wave A.
Explanation:
The energy of a wave is directly proportional to the square of the amplitude.
If a wave has higher amplitude, it will have more energy. On the other hand, a wave having lower amplitude, it will have less eenergy.
In this case, we need to tell which wave has higher energy. Hence, the correct option is A because it has a higher amplitude.
when operating a heater of 1500 watts for 3 hours per day the consumed energy and the total cost of 25 dirhams during a month (30 days) are ... and ...?
Answer:
I. Consumed energy = 4.5Kwh
II. Total cost = 3375 Dirhams
Explanation:
Given the following data;
Power = 1500W
Time = 3 hours
To find the energy consumption;
Energy = power * time
Substituting into the equation, we have;
Energy consumption = 1500 * 3
Energy consumption = 4500 watt-hour = 4.5Kwh (1 Kilowatts is equal to 1000 watts)
To find the total cost;
Daily cost = Energy consumption * cost
Daily cost = 4.5 * 25
Daily cost = 112.5 Dirham
Therefore, monthly cost = 112.5 * 30
Monthly cost = 3375 Dirham.
a car is moving at 4m/s has 500N force driving it forward and air resistance of 500N. Describe the motion of the car
Answer:
See the explanation below.
Explanation:
We know from Newton's second law that the sum of forces on a body is equal to the product of mass by acceleration. In this way, we have the following equation.
∑F = m*a
where:
∑F = sum of the forces [N] (units of Newtons)
m = mass of the car [kg]
a = acceleration [m/s²]
Therefore we have two forces one that drives the car forward and another that opposes the movement.
[tex]500-500 = m*a\\m*a=0\\a=0[/tex]
This tells us that the acceleration is zero and therefore the movement is with constant speed. That is, the speed does not vary during the movement of the vehicle.
How many sig figs are in 0.32
TRUE OR FALSE: Aquaponics decreases cost for equipment, energy usage, and land usage. *
Answer: b
Explanation:
b
Answer:
b
Explanation:
b
A projectile is fired at an angle of 53° to the horizontal with a speed of 80. meters per second. What is the vertical component of the projectile's initial velocity?
A) 100 m/s B) 64 m/s C) 48 m/s D) 130 m/s
Answer:64 m/s
Explanation:❤️
Define 1 watt power?
Answer:
A body is said to have power of 1 watt if it does work at the rate of 1 joule in 1 s. Watt is the SI unit of power. Other units of power include ergs per second, horsepower, metric horsepower or cheval vapeur (CV)), and foot-pounds per minute. The unit Watt is named after the scientist James Watt.
object height 10cm is placed in front of plane mirror.The height of the image will be_______?
Which kind of wind is most likely responsible for the movement of this
weather system from Dallas to St. Louis and then to Pittsburgh?
O A. Trade winds
B. Westerlies
C. Southern polar easterlies
O D. Northern polar easterlies
pls answer fast
Answer:
A. Trade winds
Explanation:
Dallas is located in southern US northern taxes, the city is bounded by highland park and hills. Dallas is a humid subtropical climate and is continental in nature is characterized by extreme weather events such as tornadoes and hailstorms.Answer:
b
Explanation:
Thx to random guy I know this
The crust, mantle, asthenosphere, and core are all parts of Earth’s
atmosphere.
biosphere.
hydrosphere.
geosphere
What is the medium when you are in your bedroom listening to the radio?
Answer:
this equation doesn't work
Explanation:
no one listens to radio anymore
Answer:
What numbers?
Explanation:
estion 20
Not yet answered Market out of 100 Flag question
Slim Jim lifts a 8 kg box to a height of 2 m. How much work did he do to the box?
Which describes a condition of the neritic zone?
few organisms
ample sunlight
changing salinity
frigid temperatures
Answer:
ample sunlight
Explanation:
Neritic zone have ample of sunlight
What is Neritic zone ?The neritic zone is covered with generally well - oxygenated water , receives plenty of sunlight , have relatively stable temperature , has low water pressure and stable salinity levels .
Hence , correct option is option b) ample sunlight
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3 ways that asteroids are like planets
Answer:
1.Asteroids aren't all round like planets. They have jagged and irregular shapes.
2.Some asteroids are hundreds of miles in diameter, but many more are as small as pebbles.
3.Most asteroids are made of different kinds of rocks, but some have clays or metals, such as nickel and iron.
Explanation:
it is simple really u just need to remember that astorids do not orbit a sun they crash into things like planets and mess them up really bad if they hit our sun which might happen it will just burn up because our sun is so hot that it can burn stuff if a astorid hits earth it wont be to bad for our earth at all it might cause some damage but we will be fine.
Costal residents must do many things to prepare for hurricanes
The question in the photo.
Answer:
pretty sure it's vacuole. It stores water, nutrients, and disposes of waste.
Answer:
Your AnsweR is
Lysosome
Calculate the velocity of the objects motion represented in the following graph. Show all your work.
Pleaseeeee?????? I need help!!!!!!!!
as we know that velocity= displacement/change in time
hence velocity here is= 11-3/12-0
=8/12
=2/3
=0.667m/s
hopefully i am right
Does your shadow grow bigger when the sun is in front of you or behind you
Answer:
behind
Explanation:
because just because that's why lol
How will the electrostatic force be changed if the distance between electric charges is reduced one half of the original distance?
A) more than original force
B) less than original force
C) impossible to determine
D) the same as original force
